Ken,
Stinson L-1A (L-1F) (F with floats, but they've been removed) 41-19039 has been identified by the National Museum of the USAF as being previously N4782C. I just got the c/n from them and submitted it to the L-1A profile.
Since the profile did not have a previous c/n, and the types show a wee bit different, I didn't want to try to link the two. Can you do this when you have nothing better to do?
Thanks,
Glenn